package com.wytec.xywzxw.utils;

import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.jetbrains.annotations.Nullable;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.*;
import java.util.Map.Entry;

public class HttpUtils {

    public static String doGet(String url, Map<String, Object> paramMap,Map<String, String> headerMap) {
        CloseableHttpClient httpClient = null;
        CloseableHttpResponse response = null;
        String result = "";
        try {
            // 通过址默认配置创建一个httpClient实例
            httpClient = HttpClients.createDefault();
            ArrayList<String> paramList = new ArrayList<>();
            for (String key: paramMap.keySet()) {
                paramList.add(key+"="+paramMap.get(key).toString());
            }
            String params = String.join("&", paramList);
            if (url.contains("?")){
                url = url+"&"+params;
            }else {
                url = url+"?"+params;
            }

            // 创建httpGet远程连接实例
            HttpGet httpGet = new HttpGet(url);
            // 设置请求头信息，鉴权
            for (String key: headerMap.keySet()) {
                httpGet.setHeader(key,headerMap.get(key));
            }
            // 设置配置请求参数
            RequestConfig requestConfig = RequestConfig.custom().
                    setConnectTimeout(35000)// 连接主机服务超时时间
                    .setConnectionRequestTimeout(35000)// 请求超时时间
                    .setSocketTimeout(60000)// 数据读取超时时间
                    .build();
            // 为httpGet实例设置配置
            httpGet.setConfig(requestConfig);
            // 执行get请求得到返回对象
            response = httpClient.execute(httpGet);
            // 通过返回对象获取返回数据
            HttpEntity entity = response.getEntity();
            // 通过EntityUtils中的toString方法将结果转换为字符串
            result = EntityUtils.toString(entity);
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            if (null != response) {
                try {
                    response.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != httpClient) {
                try {
                    httpClient.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return result;
    }

    public static String doPost(String url, Map<String, Object> paramMap, Map<String, String> headerMap) {
        CloseableHttpClient httpClient = null;
        CloseableHttpResponse httpResponse = null;
        String result = "";
        // 创建httpClient实例
        httpClient = HttpClients.createDefault();
        // 创建httpPost远程连接实例
        HttpPost httpPost = new HttpPost(url);
        // 配置请求参数实例
        RequestConfig requestConfig = RequestConfig.custom()
                .setConnectTimeout(35000)// 设置连接主机服务超时时间
                .setConnectionRequestTimeout(35000)// 设置连接请求超时时间
                .setSocketTimeout(60000)// 设置读取数据连接超时时间
                .build();
        // 为httpPost实例设置配置
        httpPost.setConfig(requestConfig);
        // 设置请求头
        for (String key: headerMap.keySet()) {
            httpPost.setHeader(key,headerMap.get(key));
        }
        // 封装post请求参数
        if (null != paramMap && !paramMap.isEmpty()) {
            List<NameValuePair> nvps = new ArrayList<NameValuePair>();
            // 通过map集成entrySet方法获取entity
            Set<Entry<String, Object>> entrySet = paramMap.entrySet();
            // 循环遍历，获取迭代器
            for (Entry<String, Object> mapEntry : entrySet) {
                nvps.add(new BasicNameValuePair(mapEntry.getKey(), mapEntry.getValue().toString()));
            }

            // 为httpPost设置封装好的请求参数
            try {
                httpPost.setEntity(new UrlEncodedFormEntity(nvps, "UTF-8"));
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
        }
        try {
            // httpClient对象执行post请求,并返回响应参数对象
            httpResponse = httpClient.execute(httpPost);
            // 从响应对象中获取响应内容
            HttpEntity entity = httpResponse.getEntity();
            result = EntityUtils.toString(entity);
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            if (null != httpResponse) {
                try {
                    httpResponse.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != httpClient) {
                try {
                    httpClient.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return result;
    }


    /**
     * post请求
     * @param httpUrl 链接
     * @param param 参数
     * @return
     */
    public static String doJsonPost(String httpUrl, @Nullable String param) {
        StringBuffer result=new StringBuffer();
        //连接
        HttpURLConnection connection=null;
        OutputStream os=null;
        InputStream is=null;
        BufferedReader br=null;
        try {
            //创建连接对象
            URL url=new URL(httpUrl);
            //创建连接
            connection= (HttpURLConnection) url.openConnection();
            //设置请求方法
            connection.setRequestMethod("POST");
            //设置连接超时时间
            connection.setConnectTimeout(15000);
            //设置读取超时时间
            connection.setReadTimeout(15000);
            //设置是否可读取
            connection.setDoOutput(true);
            //设置响应是否可读取
            connection.setDoInput(true);
            //设置参数类型
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            //拼装参数
            if(param!=null&&!param.equals("")){
                //设置参数
                os=connection.getOutputStream();
                //拼装参数
                os.write(param.getBytes("UTF-8"));
            }
            //设置权限
            //设置请求头等
            //开启连接
            //connection.connect();
            //读取响应
            if(connection.getResponseCode()==200){
                is=connection.getInputStream();
                if(is!=null){
                    br=new BufferedReader(new InputStreamReader(is,"UTF-8"));
                    String temp=null;
                    if((temp=br.readLine())!=null){
                        result.append(temp);
                    }
                }
            }
            //关闭连接
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if(br!=null){
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(os!=null){
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(is!=null){
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            //关闭连接
            connection.disconnect();
        }
        return result.toString();
    }
}